(declare-fun a () String)
(declare-fun b () String)
(declare-fun c () String)
(assert (not (= (str.substr a 0 (str.len b)) "")))
(assert (and (= (ite (= (str.len (str.substr (str.replace (str.replace a b "") "29M8u" "") 1 (- (str.len c) 1))) 0) 1 0) (ite (= (str.at (str.replace (str.replace a b "") "29M8u" "") 0) "") 1 0) (ite (= (str.len (str.replace (str.replace a b "") "29M8u" "")) 0) 1 0) 0) (>= (- (str.len (str.replace (str.replace a b "") "29M8u" "")) 1) 0)))
(check-sat)
